JP2004066848A - Transmitter for tire state monitoring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmitter for a tire state monitoring device capable of easily securing an optimum installation state. <P>SOLUTION: An insertion part 27 of a valve stem 11 is inserted into an insertion hole 26 of a connecting wall 21 of a casing 10, and the casing 10 and the valve stem 11 are connected with each other so that the casing 10 is rotatable around a rotating center O. The casing 10 is arranged on an inner side of a wheel 5 so that a protrusion 10a of the casing 10 abuts with a drop center part 5b. A bolt 35 is screwed into a screw hole 36 of the insertion part 27 and a tip part 35a thereof protruding from the insertion part 27 is abutted with an inclined surface 31 formed on an upper surface of the casing 10, and thereby the rotation is restricted. The rotation of the casing 10 is restricted and the casing 10 is fixed on the drop center part 5b. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transmitter for a tire condition monitoring device, and more particularly to a transmitter mounted on a wheel on which a tire is mounted in order to transmit information on tire air pressure to a receiver provided in the vehicle.
[0002]
[Prior art]
In recent years, mainly from the viewpoint of ensuring safety during traveling, a wireless tire condition monitoring device is becoming widespread in order to check the condition of a tire mounted on a vehicle in a passenger compartment.
[0003]
As shown in FIG. 5, such a tire condition monitoring apparatus includes a transmitter 50 that transmits information related to tire air pressure to a receiver (not shown) provided in the vehicle interior. The transmitter 50 includes a casing 51 having a box shape and a valve stem 52 provided integrally with the casing 51. The casing 51 houses an electronic board (not shown) on which circuit elements such as a pressure detection element and each signal processing element are mounted, and a battery (not shown) for supplying driving power to these circuit elements. A ventilation hole (not shown) is formed in the casing 51.
[0004]
As shown in FIG. 6, the transmitter 50 is attached to the valve hole 63 of the tire wheel 62 so that the casing 51 is located in the internal space of the tire 61. Air injected from the valve stem 52 is discharged into the tire 61 through the vent hole.
[0005]
[Problems to be solved by the invention]
By the way, in order to reduce the weight of the transmitter, the casing 51 is formed of a resin material. However, centrifugal force acts on the transmitter 50 attached to the tire wheel 62 when the vehicle travels. This centrifugal force corresponds to the diameter of the tire wheel 62, the outer diameter of the tire 61, and the traveling speed of the vehicle, and is, for example, about 1500 G at 300 km / h. This centrifugal force acts to deform the casing 51 of the transmitter 50 in a direction away from the tire wheel 62. As a result, in the conventional transmitter 50 in which the casing 51 and the valve stem 52 are integrally formed, when the casing 51 is deformed against its own elastic force, stress is applied to the electronic board accommodated in the casing 51. This may cause problems such as poor electrical connection due to mechanical stress.
[0006]
Further, when the tire 61 is attached to and detached from the tire wheel 62, the bead portion 61 a of the tire 61 passes over the casing 51 of the transmitter 50 as shown in FIG. 6. At this time, the casing 51 of the transmitter 50 is pressed toward the tire wheel 62 by the bead portion 61 a of the tire 61. In particular, when the angle formed by the rotation axis of the tire wheel 62 and the central axis of the valve hole 63 of the tire wheel 62 (hereinafter, the formation angle of the valve hole 63) is large, the casing 51 has a drop center portion of the tire wheel 62. Separated from 62a. In this case, the bead portion 61a of the tire 61 does not easily pass over the casing 51 of the transmitter 50, and the degree of the pressing force against the casing 51 by the bead portion 61a increases, and the electrons housed in the casing 51 are increased. The probability that a defect will occur in the substrate increases.
[0007]
Conventionally, in order to prevent such a problem, the inclination angle between the casing 51 and the valve stem 52 is set to be equal to or larger than the formation angle of the valve hole 63 in advance so that the casing 51 does not always contact the drop center portion 62a of the tire wheel 62. The transmitter 50 was formed as follows.
[0008]
However, the valve hole 63 of the tire wheel 62 is formed at an angle within a predetermined range (15 to 25 degrees) with respect to the rotation axis of the tire wheel 62, and the position of the valve hole 63 also varies. Further, the inclination of the rim 62b with respect to the drop center portion 62a of the tire wheel 62 varies from product to product from the viewpoint of design. Therefore, in order to ensure an optimal mounting state with the conventional transmitter 50 in which the casing 51 and the valve stem 52 are integrally formed, the inclination angle between the casing 51 and the valve stem 52 optimized for each product. It is necessary to form the transmitter 50 having the above-mentioned, which has been a cause of increasing the manufacturing cost.
[0009]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a transmitter of a tire condition monitoring device that can easily secure an optimum mounting condition.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a casing that is disposed inside a tire mounted on a vehicle and houses various electrical components for measuring the state of the tire, and the tire are mounted. A transmitter for a tire condition monitoring device that transmits data indicating the condition of the tire, and the casing is substantially orthogonal to the outer peripheral surface of the wheel with the connecting portion as an axis The valve stem is connected to the valve stem so as to be pivotable in the direction of rotation, and is fixed to the outer peripheral surface by a fixing means that restricts the rotation when one end of the casing abuts against a surface opposite to the outer peripheral surface of the casing.
[0011]
Therefore, according to the first aspect of the present invention, when the casing is rotated, an inclination angle with the valve stem is varied, and the casing is fixed to the outer peripheral surface by the fixing means. Therefore, the bead portion is difficult to contact even when the tire is attached / detached, and sudden impact is unlikely to be applied even at the time of contact. Furthermore, since one end abuts on the fixing means, the casing is hardly deformed by centrifugal force.
[0012]
According to a second aspect of the present invention, an end portion of the valve stem passes through the connecting portion, and the fixing means is provided at the end portion to restrict the rotation of the casing in the end portion direction. .
[0013]
Therefore, according to the second aspect of the invention, the inclination angle between the casing and the valve stem is regulated in one direction. Therefore, attachment becomes easy.
According to a third aspect of the present invention, the fixing means penetrates the valve stem in a direction facing the casing, and one end of the fixing means protruding from the valve stem makes the casing contact.
[0014]
Therefore, according to the invention described in claim 3, since the overall size can be reduced, the bead portion of the tire is difficult to contact.
According to the invention described in claim 4, the length of the fixing means protruding from the valve stem is adjustable.
[0015]
Therefore, according to the fourth aspect of the invention, it is easy to set the inclination angle between the casing and the valve stem.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the tire condition monitoring device includes four transmitters 3 provided on tire wheels (not shown) on which four tires 2 of the vehicle 1 are mounted, and 1 provided on the vehicle body of the vehicle 1. And four receivers 4. Each transmitter 3 measures the state of the corresponding tire 2, that is, the internal air pressure and the internal temperature, and wirelessly transmits data indicating the measured state to the receiver 4. The receiver 4 displays pressure information and temperature information on a display (not shown) provided in the passenger compartment based on the received data.
[0017]
As shown in FIGS. 3 and 4, each transmitter 3 includes a casing 10 disposed inside the tire 2 and a valve stem 11 attached to a valve hole 7 formed in the rim 5 a of the wheel 5.
[0018]
The casing 10 has a box shape, and is formed of a thermoplastic resin in the present embodiment. The casing 10 accommodates an electronic board 12 on which various electrical components such as a pressure sensor, a temperature sensor, a signal processing device, and a battery are mounted.
[0019]
The casing 10 is disposed on the inner side of the wheel 5 so that one surface thereof is along the drop center portion 5b which is a part of the outer peripheral surface of the wheel 5, and the surface on the drop center portion 5b side (the lower side in the figure). ) Is formed in contact with the drop center portion 5b. For the following description, the surface on the lid 13 side is the lower surface of the casing 10, and the opposite surface (the upper side in the figure) is the upper surface.
[0020]
The casing 10 has an opening on its lower surface, and the electronic substrate 12 is disposed in the casing 10 from the opening. The opening is closed by the lid 13.
[0021]
The valve stem 11 extends to the outside through the valve hole 7 formed in the wheel. A flange 15 is formed at the proximal end portion of the valve stem 11, and a grommet 16 is attached so as to be in close contact with the flange 15. In the present embodiment, rubber grommets 16 are used in order to improve adhesion.
[0022]
A valve nut 17 is detachably screwed to an intermediate portion of the valve stem 11 in the axial direction. Further, a resin or metal valve cap 18 is detachably screwed to the tip of the valve stem 11. That is, with the valve cap 18 and the valve nut 17 removed, the valve stem 11 is inserted into the valve hole 7 from the inside of the wheel 5 of the rim 5a, and the valve nut 17 is screwed to the valve stem 11 from the outside of the wheel 5. By doing so, the valve stem 11 is attached to the valve hole 7 of the wheel 5.
[0023]
The casing 10 and the valve stem 11 are connected to each other by a connecting portion 20 so that the angle between the casing 10 and the valve stem 11 can be adjusted. The connecting portion 20 includes a connecting wall 21 erected along the rim 5 a at the end on the rim 5 a side, a sliding surface 11 a formed on the valve stem 11, a locking ring 22, and a spring 23. Have.
[0024]
On the surface of the connecting wall 21 on the rim 5a side, there is formed a recess 25 having a smooth partial curved surface whose inner surface extends along the direction along the rim 5a (the radial direction of the tire). And the insertion hole 26 is formed in the center part of the recessed part 25, and the insertion hole 26 is extended elongate along the direction in alignment with the rim | limb 5a.
[0025]
The sliding surface 11a is formed so as to protrude toward the concave portion 25 on the inner side of the wheel 5 than the flange 15 of the valve stem 11. The sliding surface 11a has a smooth partial curved surface extending along a direction parallel to the rim 5a, and the shape thereof is formed to be substantially the same as the shape of the inner surface of the recess 25. Then, the inner surface of the recess 25 slides on the sliding surface 11a, so that the casing 10 is centered on the rotation center O that is the intersection of the axis of the valve stem 11 and the extension line of the flange 15. The insertion hole 26 can be rotated in the longitudinal direction. That is, the casing 10 and the valve stem 11 are connected so that the inclination angle of the casing 10 and the valve stem 11 can be changed by the casing 10 rotating about the rotation center O.
[0026]
And the insertion part 27 formed narrower than the other part of the valve stem 11 is extended | stretched from the said sliding surface 11a. The insertion portion 27 is inserted through the insertion hole 26 so that the sliding surface 11 a contacts the inner surface of the recess 25 formed in the connection wall 21.
[0027]
A locking ring 22 is fitted into the insertion portion 27, and a spring 23 is disposed between the locking ring 22 and the connecting portion 20. The spring 23 biases the locking ring 22 and the connecting portion 20 away from each other. That is, the casing 10 is connected to the valve stem 11 so that the inner surface of the recess 25 formed in the connecting portion 20 is pressed against the sliding surface 11 a of the valve stem 11 by the elastic force of the spring 23.
[0028]
The width of the insertion hole 26 is formed substantially the same as the diameter of the insertion portion 27, and the rotation and movement of the insertion hole 26 other than the longitudinal direction are restricted. Further, since both the sliding surface 11a and the concave portion 25 are curved along the longitudinal direction of the insertion hole 26, the rotation of the insertion portion 27 around its axis is also restricted.
[0029]
The transmitter 3 is provided with a fixing unit 30. The fixing part 30 fixes the angle formed by the casing 10 and the valve stem 11. Specifically, it is provided to restrict the rotation of the casing 10. The fixing part 30 has a slope 31 formed on the upper surface of the casing 10, a metal plate 32 provided on the slope 31, and a bolt 35 as fixing means. The inclined surface 31 is formed on the upper surface of the casing 10 so as to be inclined from the vicinity of the center of the upper surface toward the connecting portion 20. The slope 31 is covered with a metal plate 32.
[0030]
In the present embodiment, the bolt 35 is a hexagon socket head bolt, and the bolt 35 is screwed into a screw hole 36 formed in the vicinity of the distal end portion of the insertion portion 27. The screw hole 36 is formed so that the tip portion 35 a of the bolt 35 inserted into the screw hole faces the upper surface of the casing 10, and the tip portion 35 a protruding through the insertion portion 27 is the tip of the upper surface of the casing 10. It abuts on the inclined surface 31 formed at a position facing the portion 35a. As a result, the casing 10 is restricted from rotating in the direction of the rim 5a, and the projection 10a of the casing 10 is held in contact with the drop center portion 5b. In the present embodiment, the tip 35a of the bolt 35 is formed in a conical shape that protrudes toward the tip. And the side section makes an acute angle.
[0031]
In the vicinity of the slope 31, a pair of protective walls 37 are erected so as to sandwich the slope 31. These protective walls 37 are extended from the end part on the connecting part 20 side toward the end part on the opposite side (see FIG. 2). These protective walls 37 are formed in such a shape that the bead portion of the tire 2 is not caught by the fixed portion 30.
[0032]
An air introduction hole 38 is formed in the valve stem 11 along the axial direction. Although not particularly shown, a valve core is fitted in the air introduction hole 38. A through hole 39 communicating with the air introduction hole 38 is formed in the insertion portion 27. That is, air is injected into the tire 2 through the air introduction hole 38 and the through hole 39 of the insertion portion 27.
[0033]
As described above, according to the present embodiment, the following operations and effects are achieved.
(1) The insertion portion 27 of the valve stem 11 is inserted into the insertion hole 26 that is formed in the connection wall 21 of the casing 10 so as to be elongated in the direction along the rim 5a. The width of the insertion hole 26 is formed to be substantially the same as the diameter of the insertion portion 27, and the shape of the sliding surface 11a of the valve stem 11 and the shape of the inner surface of the recess 25 are substantially the same smooth curved surface. Formed. The casing 10 and the valve stem 11 are coupled so that the inner surface of the recess 25 is pressed against the sliding surface 11 a of the valve stem 11 by the elastic force of the spring 23 disposed in the insertion portion 27.
[0034]
As a result, the casing 10 rotates in the longitudinal direction of the insertion hole 26 around the rotation center O when the inner surface of the recess 25 slides on the sliding surface 11a. The angle of inclination with is variable.
[0035]
As a result, even if the wheel 5 has a shape in which the drop center portion 5b and the rim 5a are substantially perpendicular to each other as shown in FIG. 3, the wheel has a shape in which the inclination of the rim 5a is large with respect to the drop center portion 5b as shown in FIG. Even in the case of 5, it is possible to easily secure an optimal mounting state.
[0036]
Specifically, as shown in FIG. 3, in the wheel 5 having the small formation angle θ <b> 1 of the valve hole 7, the casing 10 is rotated so as to reduce the inclination angle θ <b> 2 between the casing 10 and the valve stem 11. Further, as shown in FIG. 4, in the wheel 5 in which the formation angle θ <b> 3 of the valve hole 7 is large, the casing 10 is rotated so as to increase the inclination angle θ <b> 4 between the casing 10 and the valve stem 11. As described above, by varying the inclination angle between the casing 10 and the valve stem 11, it is possible to easily ensure an optimum mounting state at all times according to the shape of the wheel 5.
[0037]
(2) The casing 10 is disposed on the inner side of the wheel 5 so that one surface thereof is along the drop center portion 5b of the wheel 5, and the protrusion 10a formed on the lower surface of the casing 10 contacts the drop center portion 5b. I decided to touch. Therefore, even when the tire 2 is attached to and detached from the wheel 5, the bead portion of the tire 2 is difficult to contact the casing 10. Further, even when the bead portion of the tire 2 comes into contact and the casing 10 is pressed toward the drop center portion 5b, the casing 10 and the drop center portion 5b are in contact with each other in advance, so that sudden impact is applied. Can be avoided.
[0038]
(3) On the upper surface of the casing 10, a slope 31 that is inclined so as to become lower toward the connecting portion 20 from the vicinity of the central portion thereof is formed. A screw hole 36 is formed in the vicinity of the distal end portion of the insertion portion 27, and a bolt 35 is screwed. It is set as the structure contact | abutted to the said slope 31 formed in the position which opposes.
[0039]
Thereby, by tightening the bolt 35, the tip 35a protrudes from the insertion portion 27, and the casing 10 is restricted from rotating in the direction of the rim 5a by the tip 35a so as to be pressed against the drop center 5b. Fixed to.
[0040]
More specifically, as shown in FIG. 3, when the casing 10 is disposed along the drop center portion 5b, the bolt 35 is tightened to such an extent that the tip portion 35a protrudes slightly in the wheel 5 having a small inclination angle θ2. Thus, the casing 10 is pressed against the drop center portion 5b and fixed. Further, in the case of the wheel 5 in which the inclination angle θ4 between the casing 10 and the valve stem 11 is large as shown in FIG. 4, the casing 10 is made to have a drop center by increasing the protruding amount of the tip 35a of the bolt 35. It is pressed and fixed to the part 5b. In this case, since the inclination angle θ4 is large, the bolt 35 is inclined with respect to the casing 10 in the direction of the connecting portion 20. However, since the inclined surface 31 with which the distal end portion 35a abuts is inclined so as to become lower toward the connecting portion 20, the distal end portion 35a abuts substantially orthogonally by abutting on the upper side of the inclined surface 31. be able to. Further, the front end portion 35 a presses the slope 31, so that the front end portion 35 a tends to move to the lower side of the slope 31. At this time, the pressing force acts on the casing 10 toward the drop center portion 5b.
[0041]
As a result, the casing 10 is securely fixed along the drop center portion 5b of the wheel 5 so as to be pressed against the bolt 35, so that the casing 10 can be prevented from being deformed by the centrifugal force acting when the vehicle travels. Therefore, since the stress applied to the electronic substrate 12 due to the deformation of the casing 10 is relieved, it is possible to avoid the occurrence of defects due to mechanical stress.
[0042]
(4) The slope 31 is covered with the metal plate 32. Therefore, even if an external force is applied to the casing 10 due to centrifugal force or contact with the tire bead portion, the tip 35a and the slope 31 of the bolt 35 are not creeped or deformed. As a result, a reliable fixed state is always maintained.
[0043]
(5) A pair of protective walls 37 are erected in the vicinity of the inclined surface 31 so as to sandwich the inclined surface 31, and these protective walls 37 extend from the end portion on the connecting portion 20 side toward the opposite end portion. It was decided to install. As a result, the insertion portion 27 and the bolt 35 of the valve stem 11 can be protected from contact with the tire bead portion.
[0044]
In addition, you may change the said embodiment into the following aspects.
A temperature sensor may be provided in the transmitter 3 so that air pressure data and temperature data in the tire 2 are wirelessly transmitted from the transmitter 3 as data indicating the state of the tire.
[0045]
The vehicle is not limited to a four-wheeled vehicle, and the embodiment is applied to a two-wheeled bicycle or motorcycle, a multi-wheeled bus or a towed vehicle, or an industrial vehicle (for example, a forklift) equipped with tires. Also good. In addition, when applying the said embodiment to a towed vehicle, it cannot be overemphasized that the receiver 4 and a display are installed in a towed vehicle.
[0046]
-In this embodiment, it was set as the structure which forms the slope 31 in the upper surface of the casing 10, and contact | abuts the front-end | tip part 35a of the volt | bolt 35 to the said slope 31 concerned. However, the present invention is not limited to this, and a curved surface that can be contacted so that the distal end portion 35a is always orthogonal may be formed. With such a configuration, a better fixed state can be secured.
[0047]
In the present embodiment, the bolt 35 is fastened so that the tip 35a comes into contact with the inclined surface 31 on the upper surface of the casing 10, and the casing 10 is fixed to be pressed against the drop center portion 5b. However, the present invention is not limited to this. Instead of the screw hole 36, a through hole is provided, a pressing member that penetrates the through hole is provided, and an elastic member is disposed on the pressing member. And it is good also as urging | biasing the said press member in the direction in which the front-end | tip of the said press member protrudes in the casing 10 direction. With such a configuration, the casing 10 is pressed against the drop center portion 5b by the elastic force of the elastic member, so that adjustment by screw tightening is unnecessary, and an optimal mounting state can be more easily ensured. Furthermore, when the tire 2 rotates and the centrifugal force accompanying the rotation exceeds the elastic force, the casing 10 is detached from the drop center portion 5b. Thereby, the influence of the wheel 5 when the transmitter 3 wirelessly transmits the measurement data to the receiver 4 is reduced. As a result, it is possible to easily ensure an optimal mounting state that can ensure a good communication state.
[0048]
-In this embodiment, the hexagon socket head cap screw was used as the volt | bolt 35, However, Not only this but a screw, a normal volt | bolt, etc. may be used.
In the present embodiment, the bolt 35 penetrates the insertion portion 27 and the angle between the casing 10 and the valve stem 11 is determined by changing the protruding amount. However, it is not always necessary to pass through the insertion portion 27, so long as the distance between the insertion portion 27 and the inclined surface 31 can be adjusted, even if it is built in the insertion portion 27, It may be attached.
[0049]
In the present embodiment, the insertion portion 27 is inserted into the insertion hole 26, and the casing 10 and the valve stem 11 are connected by the locking ring 22 and the spring 23. However, the present invention is not limited thereto, and a pair of plate-like members facing each other is provided as the connecting portion 20, and the insertion portion 27 is disposed between these plate-like members, and the connection portion 20 and the insertion portion 27 are penetrated. The casing 10 may be supported by a moving shaft.
[0050]
In the present embodiment, the inclined surface 31 is covered with the metal plate 32, but may not be covered with metal or the like.
Furthermore, the technical idea grasped from the above embodiment will be described below together with the effects thereof.
[0051]
(1) In the transmitter of the tire condition monitoring device according to claim 4, a through hole is formed in an end portion of the valve stem, and a screw thread is threaded in the through hole and the fixing means, and the fixing is performed. The means is screwed into the through hole, and the transmitter of the tire condition monitoring device.
[0052]
(2) The transmitter of the tire condition monitoring apparatus according to (1), wherein the fixing means is a bolt.
(3) In the transmitter of the tire condition monitoring device according to any one of claims 1 to 4 and (1) to (2), on the surface of the casing opposite to the installation surface. A transmitter of a tire condition monitoring device, wherein a slope is formed and the fixing means abuts on the slope.
[0053]
(4) The transmitter of the tire condition monitoring device according to (3), wherein the slope is inclined so as to become lower toward the connecting portion. .
[0054]
(5) The transmitter of the tire condition monitoring apparatus according to (3) or (4), wherein the slope is covered with metal.
[0055]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a transmitter of a tire condition monitoring device that can easily ensure an optimum mounting condition.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a vehicle equipped with a tire condition monitoring device of the present embodiment.
FIG. 2 is a top view showing the structure of the transmitter. FIG. 3 is a side sectional view of the transmitter attached to a wheel.
FIG. 4 is a side cross-sectional view of a transmitter that is also mounted on a wheel.
FIG. 5 is a top view showing a structure of a conventional transmitter.
FIG. 6 is an explanatory diagram when a tire is mounted on a tire wheel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 2 ... Tire, 3 ... Transmitter, 5 ... Wheel, 5b ... Drop center part, 10 ... Casing, 10a ... Projection, 11 ... Valve stem, 11a ... Sliding surface, 20 ... Connection part, 21 ... Connection wall, 22 ...... Lock ring, 23 ... Spring, 25 ... Recess, 26 ... Insertion hole, 27 ... Insertion part, 30 ... Fixing part, 31 ... Slope, 35 ... Bolt, 36 ... Screw hole.

Claims (4)

A casing that is disposed inside a tire mounted on a vehicle and houses various electrical components for measuring the state of the tire, and a valve stem that is attached to a wheel on which the tire is mounted, A transmitter of a tire condition monitoring device for transmitting data indicating:
The casing is connected to the valve stem so as to be rotatable in a direction substantially orthogonal to the outer peripheral surface of the wheel with the connecting portion as an axis,
Being fixed to the outer peripheral surface by a fixing means for restricting the rotation when one end of the casing abuts against a surface opposite to the outer peripheral surface of the casing;
A transmitter for a tire condition monitoring device. In the transmitter of the tire condition monitoring device according to claim 1,
The end of the valve stem passes through the connecting part,
The fixing means is provided at the end, and restricts rotation of the casing in the direction of the end;
A transmitter for a tire condition monitoring device. In the transmitter of the tire condition monitoring device according to claim 2,
The fixing means penetrates the valve stem in a direction facing the casing, and one end of the fixing means protruding from the valve stem comes into contact with the casing;
A transmitter for a tire condition monitoring device. In the transmitter of the tire condition monitoring device according to claim 3,
The fixing means is adjustable in length protruding from the valve stem;
A transmitter for a tire condition monitoring device.

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